package com.buddy.learn.source._thread;

import java.util.concurrent.CountDownLatch;

/**
 * @author Buddy
 * @date 2021/4/19
 */
public class CacheLinePadding_Deprecated {

    // 循环次数
    public static long COUNT = 1_0000_0000L;

    // T类
    @sun.misc.Contended
    private static class T {
//        public volatile long p1,p2,p3,p4,p5,p6,p7;
        public volatile long x = 0L;
//        public volatile long p9,p10,p11,p12,p13,p14,p15;
    }

    public static T[] arr = new T[2];

    static {
        arr[0] = new T();
        arr[1] = new T();
    }

    public static void main(String[] args) throws InterruptedException {
        CountDownLatch latch = new CountDownLatch(2);
        // 两个线程给 T 肤质
        Thread t1 = new Thread(() -> {
            for (long i = 0; i < COUNT; i++) {
                arr[0].x = i;
            }
            latch.countDown();
        });
        Thread t2 = new Thread(() -> {
            for (long i = 0; i < COUNT; i++) {
                arr[1].x = i;
            }
            latch.countDown();
        });
        final long start = System.nanoTime();
        t1.start();
        t2.start();
        latch.await();
        System.out.println((System.nanoTime() - start)/100_0000);
    }
}
